added at.median parameter and max.points. These should speed things up for massive data.
modularized prediction function because it was repeated in bootstrap, modularized data function to handle predictions at medians. Updated plotting function to change orientation.
added some todo tasks. This code should be abstracted into more functions to make it flexibled enough to handle out of memory models (new functions can then be built specifically for those packages, such as rx). Also, interactions should be added.
small bugfix
changed some examples.